[OAuth2Provider] Add link from account preferences to create, edit and delete OAuth2 client apps

Review Request #7914 — Created Jan. 28, 2016 and discarded — Latest diff uploaded

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Review Board
master

Reviewers

Add link from account preferences to create, edit and delete OAuth2 client apps

User need a way to create, edit and delete an OAuth2 client, so I add the link
to create, edit and delete OAuth2 client form from the main OAuth2 page.

Manual test